Granted Patent
Utility
US 5,116,917 · App. 07/625,975
Thermoplastic polyester low profile additives for vinyl ester resinous compositions
Inventors:
Ken K. Chang, Timothy A. Tufts
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: Dec 11, 1990
Inventors
Ken K. Chang
Timothy A. Tufts
Assignee (at issue)
Ashland Oil, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.